sis·trum 
(sĭstrəm)
(sĭstrəm)n. pl. sis·trums or sis·tra (-trə)
A percussion instrument of ancient Egypt, Sumeria, and Rome consisting of metal rods or loops attached to a metal frame.
[Middle English, from Latin sīstrum, from Greek seistron, from seiein, to shake.]
sistrumEgyptian bronze sistrum